AF_INET

The AF_INET address family is the address family for IPv4.

Socket Address Structure

An IPv4 transport address is specified with the SOCKADDR_IN structure.

Socket Types

IPv4 supports the following socket types:

SOCK_STREAM
Supports reliable connection-oriented byte stream communication.

SOCK_DGRAM
Supports unreliable connectionless datagram communication.

SOCK_RAW
Supports raw access to the transport protocol.

A WSK application specifies a socket type when it calls the WskSocket function or the WskSocketConnect function to create a new socket.

Protocols

The following IPv4 IPPROTO_XXX protocol values of the IPPROTO enumeration are defined in the WSK header files:

IPPROTO_IP
Internet protocol options

IPPROTO_ICMP
Internet control message protocol

IPPROTO_IGMP
Internet group management protocol

IPPROTO_GGP
Gateway to gateway protocol

IPPROTO_IPV4
IPv4 encapsulation

IPPROTO_ST
Stream protocol

IPPROTO_TCP
Transmission control protocol

IPPROTO_CBT
Core based trees protocol

IPPROTO_EGP
Exterior gateway protocol

IPPROTO_IGP
Private interior gateway protocol

IPPROTO_PUP
PARC universal packet protocol

IPPROTO_UDP
User datagram protocol

IPPROTO_IDP
Internet datagram protocol

IPPROTO_RDP
Reliable data protocol

IPPROTO_ND
Net disk protocol

IPPROTO_ICLFXBM
Wideband monitoring

IPPROTO_PIM
Protocol independent multicast

IPPROTO_PGM
Pragmatic general multicast

IPPROTO_L2TP
Layer 2 tunneling protocol

IPPROTO_SCTP
Stream control transmission protocol

IPPROTO_RAW
Raw IP packets

Additional protocols are supported through the use of raw sockets.

A WSK application specifies a protocol when it calls the WskSocket function or the WskSocketConnect function to create a new socket.

A WSK application also specifies a protocol (as the Level parameter) when it calls the WskControlSocket function to set or retrieve transport protocol level or network protocol level socket options.

Combinations

IPv4 supports the following combinations of socket types and protocols for each WSK socket category:

Basic Sockets SOCK_STREAM + IPPROTO_TCP SOCK_DGRAM + IPPROTO_UDP SOCK_RAW + IPPROTO_Xxx Listening Sockets SOCK_STREAM + IPPROTO_TCP

Datagram Sockets SOCK_DGRAM + IPPROTO_UDP SOCK_RAW + IPPROTO_Xxx Connection-Oriented Sockets SOCK_STREAM + IPPROTO_TCP

Requirements

Version	Available in Windows Vista and later versions of the Windows operating systems.
Header	Ws2def.h (include Wsk.h)